... ,office,meeting room,shops and supermarket1.Warm White:<2700K:we will feel warm and health,comfortable if used in houses,home ... ,hospitals,hotels.2.Warm light :2700K:a soft light,we will feel pleasant,comfortable,peaceful used in the shops,hospital,offices ... . After serviceWe give one year warranty to our customer from the selling dateQuality complain : We declare to all customers for one year warranty ...